pidgin/pidgin

Implement SNI support for the gnutls SSL plugin.
release-2.x.y
2019-12-16, Mihai Moldovan
6dba8046e1b1
Implement SNI support for the gnutls SSL plugin.

Note that gnutls is picky in regard to what it accepts as the server name - it
MUST be a domain name. IP addresses are not supported according to the
documentation.

Hence, filter out IP addresses and hope that whatever is not recognized as
such an address is actually a domain name. This will probably fail for more
exotic addresses (especially in IPv6 realm), but wiring up a full-blown parser
is too much effort and SSL plugins are not part of purple-3 anyway.

Fixes #17300
/*
* Purple - Send raw data across the connections of some protocols.
*
* Pidgin is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*
*/
#include "internal.h"
#include "pidgin.h"
#include "conversation.h"
#include "debug.h"
#include "prpl.h"
#include "version.h"
#include "gtkplugin.h"
#include "gtkutils.h"
#include "protocols/jabber/jabber.h"
#ifdef MAX
# undef MAX
# undef MIN
#endif
#define RAW_PLUGIN_ID "gtk-raw"
static GtkWidget *window = NULL;
static PurpleAccount *account = NULL;
static PurplePlugin *my_plugin = NULL;
static int
window_closed_cb()
{
purple_plugin_unload(my_plugin);
return FALSE;
}
static void
text_sent_cb(GtkEntry *entry)
{
const char *txt;
PurpleConnection *gc;
const char *prpl_id;
if (account == NULL)
return;
gc = purple_account_get_connection(account);
txt = gtk_entry_get_text(entry);
prpl_id = purple_account_get_protocol_id(account);
purple_debug_misc("raw", "prpl_id = %s\n", prpl_id);
if (purple_strequal(prpl_id, "prpl-toc")) {
int *a = (int *)gc->proto_data;
unsigned short seqno = htons(a[1]++ & 0xffff);
unsigned short len = htons(strlen(txt) + 1);
write(*a, "*\002", 2);
write(*a, &seqno, 2);
write(*a, &len, 2);
write(*a, txt, ntohs(len));
purple_debug(PURPLE_DEBUG_MISC, "raw", "TOC C: %s\n", txt);
} else if (purple_strequal(prpl_id, "prpl-irc")) {
write(*(int *)gc->proto_data, txt, strlen(txt));
write(*(int *)gc->proto_data, "\r\n", 2);
purple_debug(PURPLE_DEBUG_MISC, "raw", "IRC C: %s\n", txt);
} else if (purple_strequal(prpl_id, "prpl-jabber")) {
jabber_send_raw((JabberStream *)gc->proto_data, txt, -1);
} else {
purple_debug_error("raw", "Unknown protocol ID %s\n", prpl_id);
}
gtk_entry_set_text(entry, "");
}
static void
account_changed_cb(GtkWidget *dropdown, PurpleAccount *new_account,
void *user_data)
{
account = new_account;
}
static gboolean
plugin_load(PurplePlugin *plugin)
{
GtkWidget *hbox;
GtkWidget *entry;
GtkWidget *dropdown;
/* Setup the window. */
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_container_set_border_width(GTK_CONTAINER(window), 6);
g_signal_connect(G_OBJECT(window), "delete_event",
G_CALLBACK(window_closed_cb), NULL);
/* Main hbox */
hbox = gtk_hbox_new(FALSE, 6);
gtk_container_add(GTK_CONTAINER(window), hbox);
/* Account drop-down menu. */
dropdown = pidgin_account_option_menu_new(NULL, FALSE,
G_CALLBACK(account_changed_cb), NULL, NULL);
if (purple_connections_get_all())
account = (PurpleAccount *)purple_connections_get_all()->data;
gtk_box_pack_start(GTK_BOX(hbox), dropdown, FALSE, FALSE, 0);
/* Entry box */
entry = gtk_entry_new();
gtk_box_pack_start(GTK_BOX(hbox), entry, FALSE, FALSE, 0);
g_signal_connect(G_OBJECT(entry), "activate",
G_CALLBACK(text_sent_cb), NULL);
gtk_widget_show_all(window);
return TRUE;
}
static gboolean
plugin_unload(PurplePlugin *plugin)
{
if (window)
gtk_widget_destroy(window);
window = NULL;
return TRUE;
}
static PurplePluginInfo info =
{
PURPLE_PLUGIN_MAGIC,
PURPLE_MAJOR_VERSION,
PURPLE_MINOR_VERSION,
PURPLE_PLUGIN_STANDARD,
PIDGIN_PLUGIN_TYPE,
0,
NULL,
PURPLE_PRIORITY_DEFAULT,
RAW_PLUGIN_ID,
N_("Raw"),
DISPLAY_VERSION,
N_("Lets you send raw input to text-based protocols."),
N_("Lets you send raw input to text-based protocols (XMPP, IRC, "
"TOC). Hit 'Enter' in the entry box to send. Watch the debug window."),
"Eric Warmenhoven <eric@warmenhoven.org>",
PURPLE_WEBSITE,
plugin_load,
plugin_unload,
NULL,
NULL,
NULL,
NULL,
NULL
};
static void
init_plugin(PurplePlugin *plugin)
{
my_plugin = plugin;
}
PURPLE_INIT_PLUGIN(raw, init_plugin, info)